sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services T1's, CSU's and DSU's Carrier trouble or not?

Here is the basic overview of the setup, I have a Toshiba CIX100 R5.1 with LIPU/11 IPT2020-SD all latest firmware. The service provider (********) has an ATM burstable T-1 for voice and data terminated on an Adtran TA612. The voice is brought out as POTS, then connected to a RCOU3 through Oneac C.O. line surge mods. All IPT'S are connected on the lan via an Adtran Netvanta 1335 with poe/vpn. The lan ports are set up as trunks to pass vlan 2 (native) for the data network and vlan 7 for the phones. The pc's are connected to the IPT's.

Here's the problem, I cannot obtain an acceptable volume level for both the IPT's and the caller at the same time. Pad adjustments have been made both on the phone system and the C.O. lines in the TA612. If the level is high enough for the caller to hear well enough, echo is produced on the IPT. If the level is set to not produce echo the caller cannot hear the IPT very well.

It is of my opinon that this T-1 is not compatable for this system. I have not even begun to set up for IPT anywhere through the internet yet.

Does anyone have any insight on this matter, or experienced simular situations? I would greatly appreciate any input.

The Adtran should be able to pad transmit & receive individually. Many folks will pad both of them the same.

Your service provider should have a 1004Khz or milliwatt test tone. You might use a Tempo Sidekick T&N (Transmission & Noise), MetroTel VNA-70 or similar to test at the DEMARC to see what the actual loss is on the loop. The test number must reside on your provider's switch.

If it is all calls, then it can be adjusted at the CO coming out of the DCCS. This is the last piece of equipment coming out of the CO before going to the field. If it long distance only then the Carrier needs to place echo cans on their LD DCCS.